Radial Air Bearings on a Precision Shaft
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- เผยแพร่เมื่อ 29 เม.ย. 2009
- In this demonstration, Drew Devitt shows a precision shaft being spun by hand, supported on New Way Air Bearings. Pressure to the bearings was approximately 60 PSI. More information can be found at www.newwayairbearings.com
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youtube waited 10 years to recommend me this video. i miss days when youtube was full of content like this.
Hey guys welcome back to the channel, click like and subscribe!
Holy shit, and here I was thinking how innovative this is.. it's ten years old!
Today I learned air bearings exist.
I'm kinda liking this new algorithm.
Далеко не новый
I just learned about them yesterday, so I guess TH-cam figured I was interested. Applied Science's video: th-cam.com/video/K_N_h_mKf-4/w-d-xo.html
youtube 2009: nah
youtube 2019: *the world needs this technology*
@@TheRybka30 Good algorithm
Seriously. I've looked for video's of exactly this type of bearing and this never came up in an actual SEARCH. I was looking for magnetic, air and graphite/air bearings and never saw this one...
behold - the air hockey table rolled into a tube
Yes
Pretty much advanced air hockey table
Same system but huge precision
Lol
1:25 THAT noise made a permanent dent in my soul!
I felt it too.
Oh I felt that in my chest
Radial Air Bearings on a _Previously_ Precision Shaft
I never realized that can come through a recording..
Aaaaaaaaaarg
I'd like to see that shaft at 60,000 rpm with the air pressure suddenly removed... for science..
MrTurboturbine exactly What I thought 😂
can I be in a different room when it happens?
With a nice heavy flywheel (off balance) for science!
They call that friction welding 😂
spontaneous detonation.
Never heard of air bearings until now. Near zero friction...Intriguing.
sounds like air bushings ....the hydrolic motor oil is near zero friction too the crank /shaft floating in oil ...whats the application selling it to the military...= us for $$$$$$$$$$$
@@aceventura7064 An oil-bearing has a rpm limitation due to many factors including heat generated as the bearings move faster. An air-bearing should be able to reach RPMs that an oiled bearing could not. Just my thought.
@@valveman12 it seems you do not understand hydrolic bearings, except for when it is dry which over long periods can occur it is only in contact with oil or impuritys in the oil , you are hopeing that the air separates the to way different speed surfaces that may not be the case long term (out of the lab)
@@aceventura7064 If you say so...
@@valveman12 what is the application space?
this video from 2009 has sudenly blown up!
Dat shaft play.
Much like your spellcheck...
@@Penguin_of_Death i donyt halve spill chak
My gf turned on the aircondition mid highway and the car abruptly came to a squeaking halt.
It's called "Turbo" mode. Turn off A/C for Turbo. It's new and my car has it.
amazing that 60 psi can push out so much. great video, thank you
Perfect demonstration! Thank you 🙏
Applied science?
Lol i just watched that last night. Probably why this popped up in my recommended this morning...
The strange thing is that this video started to appear in my recommended videos about 2 weeks ago and popped up in the sidebar and recomended videoes all the time and i have just ignored it until now. Then Ben released his air bearing video (i have been subscribed to him for many years) and after watching that i finally checked this out as well. Almost as you wold think that the youtube algorithm knew that Applied science wold release his air bearing video two weeks before he did....
There must be a glitch in the matrix somewhere....
Well I'm impressed.
This is so immeasurable brilliant, my god
That is really helpful video, i am considering using something like this for a project i have coming up
fascinating stuff, thanks for the upload
Amazing tech, good job
Or if you are dyslexic, they are bear earrings.
Hahahahaha lol
Brilliant!
Eventually BEER RINGS
Lovely video 👍
This is really cool you guys are knowing this stuff good people keep up the great work 🦊
It's awesome precision technique
Lovley stuff, but its from 2009, i wonder what kind of stuff they have come up now? Ultra Plasma bearings? ;)
Shhhh this is secret reverse engineered technology from area 51. Currently they managed to make the antigravity work already.
Lol air bearings have been around for at least a century. They are heavily used in the machine tool cutting industry, for sharpening or making new milling machine cutters. I've used them quite a bit as a machinist, it's the only way to cut them unless you have a newer CNC cutter grinder. It's the weirdest feeling, moving a ten pound steel shaft like it weighs a half ounce and is floating in space...
Go and have a look at @appliedScience he demonstrates how to manufacture these bearings extremely cheaply at home.
@@TheExplosiveGuy that's interesting
The cutter grinders don't always have air bearings, mine has regular tapered roller bearings on the workhead and the linear motion is only by the table ways. Used for the same stuff but admittedly air bearing is better and fancier. My grinder is from 1943.
Excellent sir
This is soooooo satisfying
*****
Definitely it would fit well, even abec 7/9 bearing on small shaft is a killer for a disk turbine. I am wondering if they make small shaft application ranging from 10mm and up.
Not sure why this got recommended but enjoyed watching... we've used New Way planar bearings for glass handling and had good luck with them, but have not used them for radial applications. We HAVE done systems using ultra precision (micron'ish surface specs at 500mm'ish radius... pretty awesome design) rotary air bearing stages before and when you manually torqued that shaft I cringed - that little bit of motion would have destroyed a normal airbearing stage. Would have been interested in some metrics for what your system is capable of (runout, stiffness, etc...)
are thrust bearing variations available? and for a vertical axis wind turbine, what are the load capabilities, and degree of polish on the shaft?
I'm kinda jaded, having been a professional mechanic for almost 40 years... but that's simply amazing to me.
This tech has been around forever. The Apollo missions used gyroscopes with air bearings, just like this, for navigation. The problem with the video however is that the air bearings were not deflecting that housing, they were deflecting that pathetic little point of attachment. They were only attached by the air supply nipple, which is fine for a 90 lb shaft, but as soon as it has any appreciable load, it's just going to crush that little nipple.
This showed up in my feed a few days after watching a video by integza about a porous knife with an oxy fuel mix fed into it.
The porosity was apparently the result of a defect in selective laser sintering processes that turned out beneficial.
Was the bearing material made using the same sls process?
It leaves me wondering if it is possible to produce something like a phase change heat pump or a heat exchanger using the same process.
Good job.
Really interesting! What about surface rugosity of the rotor?
I just came here because Applied Science's video got me interested in air bearings. He made his own without any precision tooling. The man is a wizard. These are SUPER COOL technology though.
Wow....mindblowing!
So satisfying
That is amazing! I always figured magnetic bearings would be the best but this is really an amazing technology! If this is only 60 PSI, I wonder that the flow rate is b/c that means a very small compressor can run this bearing. I was expecting something like 1000 - 30,000 PSI at incredibly small holes, like near micron size.
Each of the 7 bearings flow 12 SCFH so the whole system flows less the 1.5 SCFH.
Have these bearings been trialled with a very low viscosity oil at all? Obviously air bearings are a no go in vacuum conditions, but could a very fine fluid could be forced through the pad?
We used to run rotors at my old job up to 20Krpm in a vacuum using tilt pad bearings and a 40 grade oil, and in that environment we would witness oil whip even though tilting pad bearings were designed specifically to counter that effect (as a vacuum was one of few environments this effect couldn't be negated).
Are there any air bearings that you’re aware of that can stand up to repeated shock such as in supporting an axle of a lightweight vehicle?
very nice i will be contacting you guys soon for a project i will start
Very impressive thing . . .
Thst is AMAZING!
FAN... FRIGGIN FANTASTIC!!
Is this application for drilling Machinery or can this be applicable to vehicle drive shafts?
1:21 - ouch... does that damages the graphite air bearings? new ones needed for the irreplaceable permanent damages of the scratch?
Will this work with my shaft?
That was COOL!
Nice shaft 👌
*mercedes needs some air bearings*
wow, Awesome. good job
Why haven't I heard about this? It has existed for 10 years now.
@Chris Russell I was only counting from the release date of this video. That's the numbers I have proof of.
u have seen this before trust me... it's the same principle as a hovercraft or a air hockey table xD
Nice ! Why dont we see more of this never heard of them before seeing this video. What about a thrust bearing to keep it from going linear if its not desired? Whats the maximum rpm it will endure with a shaft like this?
Google is your friend....
For Thrust bearings, imagine the same thing with opposing pairs of flat shoes on either side of a shaft flange. Air bearings really need to have engineered opposing members -or be a continuous circular unit -to keep air leakage to a minimum, then as there is "near zero" play (within the elastic range of the housing material) there is reduced risk of shockloads causing shaft damage and housing fatigue (there will be more fatigue through cycling on and off, than under designed loading)..
I think one of the NLX milling lathes at work has these, cause whenever we are without air pressure the machine stops and its the most high tech machine there so my guess would be that these bearings are probably the best for lathe work and shit like that
@Will Swift well how come it was hooked up to the air?
That's fucking awesome... How small can you make a bearing and shaft?
I wanna see if i can stick an air bearing on a 4 toothed flywheel for a bot for robot wars
@@osmacar5331 : Will you be able to feed it the air it needs?? always the problem....
what the cfm required to run this
Idk but it is a very high pressure low volume application so not much probably.
Our products are based on 60psi input pressure. The fly heights are small, in the order of 5-8 microns. The bearings themselves are very low flow. See our www.newwayairbearings.com/catalog/radial-air-bearings/ radial bearing specification page.
Here's a snarky comment from the peanut gallery: the 2 cutouts at the end of the shaft couldn't be why it's turning to face those cutouts up, because it's happening too quickly. That missing amount of metal couldn't rotate that heavy shaft so quickly.
This is really, really cool video. I had no idea 'air bearings' existed- or that they could work so well. I'm imaging things like a free piston linear steam engine/generator that would need no lubrication and would be wear-free.....
excellent for a CNC spindle
Well I just learned a bit. Interesting and surprising.
Impressive
Love the concept, but what back-up measure will there be if the air pump fails?
If the compressor failed there is compressed air in the reservoir.
+J Corey Orava It could be a good thing that it locks down without air pressure, like 18-wheeler brakes.
Machines with air bearings typically have a pressure interlock that stops any motion if the air pressure fails.
How much do these cost?
and how much pressure (PSI) would you need
60 PIS input pressure, the porous carbon is the restriction of the flow. The flow in in SCFH range. See following link for individual product flow specification: www.newwayairbearings.com/catalog/radial-air-bearings/
We would love to build a micro-machine using these bearings what a word it could provide placed on our wish list.
Do you mean a machine that is micro or a machine for micro work? Air bearings become somewhat less effective at very small scales but if you are looking to build your own linear slides for a machine you can produce something like this yourself with sintered metals, you just wouldn't want to force it without pressure like in the video unless you could get a similar self-lubricating porous material.
What is the Ra of that surface?
In 10 previous years this video got fewer comments (and probably views) than in the last few days.
How do you know its the bearing frame that is distorting to allow the air gap when the air pressure is turned on and not the porous material compressing?
I guess because graphite is too brittle to compress without turning into dust very quickly.
@WolfsburgWarehouse
I'd imagine so, if you scaled them up.
I need a setup for a vintage Pontiac V8 lol but I would settle for small block Chevy. In seriousness however, I am surprised at the low 60 psi. I suppose the closer the tolerances the less psi. In this case no tolerance so the psi would have to be great enough to flex/load the housing. Looks like a good way to check the balance of rotating objects.
Right you are, here is a video on balancing done at Hoffmann America;
th-cam.com/video/NU6A6SZbhmc/w-d-xo.html
Yes, we offer them for balance machines, they work much better then conventional rolers with lower error motions
Are these bearing adaptable to be used in a modern internal combustion engine? I'm dreaming of the possibility of an air-bearing V8 matched with electric valves. Possibly an insane amount of power...
+berker smith We have not applied our technology into an internal combustion engine. It is not that it would not work; we have just not engineered/researched it as a product development project.
+berker smith They're being used on microturbine engines. They work VERY well in that application. Bladon has a working model.
turbo shaft engines would seem a better fit for this given that they maintain consistent loads against the shaft, whereas reciprocating engines are going to be very peaky on bending loads. One reason we have to be very careful about type of propeller on aero- diesel engines. I am concerned about flight loads on these bearings though and failure modes if air pressure is lost.
Japan patented a sandblasting technique using rubber as the blasting agent to create small round indentations on the metal surface. The size of the round indentations are just the right size to trap air between a shaft and housing, essentially creating this same affect without having to pump air through it. I’ve been looking for the parents since the 90’s. I believe it was discovered by FUJI. They pioneered enclosed sandblasting machines and techniques that were over shadowed by the primary business of film. I believe it was Fuji. Someone please help and or correct me. Because I’m still looking for it he data and the patents
I'm curious how this would work on commercial washing machines and dryers used in laundromats. I'm looking for a really good explanation to justify lowering my vend prices.
It wouldn’t be practical since you would need a compressed air source and good air filtration. They are great in industrial applications.
air bearings in fast rev flywheel kinetic akumulator? :)
seems neat :)
Hey, what is the pressure ?
+Was Bigman (Wasbigman) For this demonstration, the air pressure was at 60 psi.
40psi
65 psi
TH-cam algorithm is a strange mistress why my recommended something like this?
Cool product but you actively have to use power/air pressure to make those bearings work.
Those are active bearings
Yeah, but still, if you have a engine to turn it, you should also have the engineering expertise to fit in these. Think about it, if made right, this could last forever, never needing any replacement parts, only power, and a clean filter. That could be very appealing to businesses. It would take no wear from start up or shut down like a lubed bearing would, and it has the gliding of ball bearings.
@@patrioticwhitemail9119 There's wear like you wouldn't believe the moment a piece of dust gets in there, a grain of sand will gouge through that graphite like butter. And the loading on these is limited by air pressure, you will never have your tractors axle on one of these. These are niche products, widely used in semiconductor automation and other ultra precise instrumentation, but they are in no way a generic replacement for good ol' ball bearing.
@@aleksandersuur9475 yeah. I can see that. Limited usage but extremely effective for what it can do.
how small can this type of bearing be used before it becomes impractical...?
Quite small actually I've seen them as small as a 1mm inside diameter. The only thing that you have to remember is the load capacity of the bearing is a direct relation to the surface area against the shaft.
amaizing
What's the min/max clearance between the bearing surface and the shaft?
+fromkentucky There are various factors that determine air gap. Like load, surface finish, pressure, etc. Here is a design guide that can provide you with more information: www.newwayairbearings.com/products/w-profile-concave (scroll to the bottom of this page)
According to the vid, “less than zero”
Nice
Does air leak out of non contact surface areas ?
Air comes out of the working face only
Can this kind of porous media bearings be used in model jet engine application?
Yes, we are working on using them in large gas turbines too. call us at 610 494 6700 and ask for Rick or Drew
@@drewdevitt thank you for the fast response
@@drewdevitt I was thinking about prototype of a micro jet engine for an rc plane as proof of concept because standard ball bearings last 25 hour's of engine run time before they need to be replaced so air bearing should and it will eliminate engine bearing service but as it is right now I am currently unable to purchase the type of air bearing required for the prototype engine due to lack of funding but in near future I will definitely give you guys a call and see if we can build it.
Best regards
Try a foil bearing so so you do not need a separate air supply, just make sure they stay clean. Full-ceramic ball bearings are probably best for a hobby project though.
I know capstone microturbines use air/foil bearings, different construction but similar function
Hi what is the maximum RPM you could achieve on a Precision 2 inch shaft
I presume infinite as there is zero contact.
@@richardmiddleton7770 Try 130,000 rpm @20c assuming perfect zero contact...above that would be supersonic, or the air film would "cavitate", or the friction would increase dramatically...so the bearings could fail I assume. Also I have no idea of the pressure or flow rate and how much the flow rate goes up with rpm...so really your limit depends on those factors to, you have to be able to supply enough to keep up with the velocity(might be easy if the loss is nil). You could theoretically calculate a particle thick(unrealistic) air film and its velocity and flow rate if you had a cross section of the bearing face, and then factor in losses from the side...yeah this gets complicated lol
much amazed
soi what is the shaft used for?
dathrevann shafting things. Obviously.
Great
Probably isn’t very much air pressure, correct? Just high flow rate?
In fact, that's the opposite. You need a high pressure for it to separate the bearings from the shaft since there is no clearance between them. But you need a small flow rate since it's creating a very small gap between the two. (we're talking about 1 micron of play !)
Yeah, the air pressure would need to be at least as high as the side load (force) on the shaft divided by the surface area of one bearing. Idk about the flow rate.
Patrick Donohoe ok . On paper guillotines with an air table it needs only 5psi to float 120 lbs of paper. Thought it may be similar.
@@MagnetOnlyMotors the difference is that in this case the bearings are preloaded with very high pressure so that the shaft stays centered between them even when subjected to loads much higher than gravity. 10-20ppsi would probably be enough pressure to float the shaft against just gravity. I assume you can reduce the clamping force of the frame on the shaft and get the shaft to spin with lower air pressure and reduced sideload capacity.
Where can I purchase air bearings?
Nursee Mike You can purchase air bearings by reaching out to our sales team. Here is the link: www.newwayairbearings.com/purchase/new-way-sales-and-support-team
what air consumption does this use?
Probably not much since the space between the shaft and the "bearing" is very small it requires little air. Probably a household compressor should be more than adequate. Just speculation tho
Good 👍
What pressure are they running at?
probably 110 psi. ours run at 80 and have a 250 lb max load each - same bearing as the video.
Cool, but what happens when you get an air leak
Why are they not in supper cars? Especially when u can turn them off and they will bring car to a halt then when on they would be amazingly fast?
air bearings are not a new process back in the days it was made of bronze material that was porous and air gets through like a sponge can't recall what it was called was used mostly on balancing equipment.
Very cool and probably necessary in some applications. The down fall gents is the very expensive machine and shaft or whatever their application is for is dependent upon Airlines and as we know these do fail. You may ruin an entire shaft and machine be because of an air leak. Simplicity is quality.
Very nice, but will it blend?
anyone got this recommended?
Yes, probably because I watched the air bearing video on Applied Science channel.
Would this should be used on Turbine and Generator in Power Plant
No
www.nasa.gov/centers/glenn/about/fs14grc.html
film is strong much strong
What about heat? Are they self cooling moving air through them? Would they stay cool in a loaded working application?
There's zero friction, so they don't heat up.
Hah, this is exactly what I imagined just yesterday, altough just to minimize the need of materials and parts, not so much for the friction and roll resistance!
Thus seems so niche that hardly anyone would have a use for it. (Aside from that one guy who made a lathe with it, but even then it's for very specific applications. Not something the average shop would want or need.)
Wow.